<template>
  <div id="app">
    <div class="container">
      <!-- 顶部框模块 -->
      <div class="form-group">
        <div class="input-group">
          <h4>品牌管理</h4>
        </div>
      </div>

      <!-- 数据表格 -->
      <table class="table table-bordered table-hover mt-2">
        <thead>
          <tr>
            <th>编号</th>
            <th>资产名称</th>
            <th>价格</th>
            <th>创建时间</th>
            <th>操作</th>
          </tr>
        </thead>
        <tbody v-if="list.length">
          <tr v-for="(obj,index) in list" :key='obj.id'>
            <td>{{obj.id}}</td>
            <td>{{obj.name}}</td>

            <!-- 如果价格超过100，就有red这个类 -->
            <td :class="obj.price>100?'red':''">{{obj.price}}</td>
            <td>{{obj.time|time}}</td>
            <td><a href="#" @click="del(index)">删除</a></td>
          </tr>
          <!-- 总价一栏 -->
          <tr>
            <td>统计</td>
            <td colspan="2">总价:{{total}}</td>
            <td colspan="2">均价:{{avg}}</td>
          </tr>
        </tbody>
          
        <tfoot v-else>
          <tr>
            <td colspan="5" style="text-align: center">暂无数据</td>
          </tr>
        </tfoot>
            
      </table>

      <!-- 添加资产 -->
      <form class="form-inline">
        <div class="form-group">
          <div class="input-group">
            <input
            v-model.trim="name1"
              type="text"
              class="form-control"
              placeholder="资产名称"
            />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <div class="form-group">
          <div class="input-group">
            <input
            v-model.number="price1"
              type="text"
              class="form-control"
              placeholder="价格"
            />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <!-- 阻止表单提交 -->
        <button class="btn btn-primary" @click.prevent="add">添加资产</button>
      </form>
    </div>
  </div>
</template>

<script>
import moment from 'moment'
export default {
  data() {
    return {
      // 资产列表数组
      list: [
        { id: 100, name: "外套", price: 199, time: new Date('2010-08-12')},
        { id: 101, name: "裤子", price: 34, time: new Date('2013-09-01') },
        { id: 102, name: "鞋", price: 25.4, time: new Date('2018-11-22') },
        { id: 103, name: "头发", price: 19900, time: new Date('2020-12-12') }
      ],
      name1:'',
      price1:0
    };
  },
  methods:{
    add(){
      const id=this.list.length!==0?this.list[this.list.length-1].id+1:100
      const obj={id:id,name:this.name1,price:this.price1,time:new Date()}
      this.list.push(obj)
      this.name1=''
      this.price1=''
    },
    del(index){
      this.list.splice(index,1)
    }
  },
  filters:{
    time(data){
      return moment(data).format('YYYY-MM-DD hh:mm:ss')
    }
  },
  computed:{
    total(){
       return this.list.reduce((sum,obj)=>{return sum+=obj.price},0)
    },
    avg(){
      return this.total/this.list.length
    }
  }

};
</script>

<style >
.red{
  color: red;
}
table tbody tr:last-child{
  background-color: bisque;
}
</style>